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(No Modeh) J. E. SIMPSON. MANUFAGTURE 0F DRAW BARS.

Patented Ang. 30l 1887.

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J. H. SIMPSON.

MANUFAGTURB OP DRAW BARS.

No. 369,264, Patented Aug. 30, 1887.

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Nrrsn STATES PATENT Ormea.

JAMES Il. SIMPSON, OF FITTSBURG, PENNSYLVANIA, ASSIGNOR TO CARNE- GIE, PHIPFS 85 C-O., (LIMITED) OF SAME PLACE.

MANUFACTURE OF DRAW-BARS.

SPECIFICATION forming part of Letters Patent No. 369,264, dated August S0, 1887.

(No model.)

To all whom it may concern.-

Be it known that I, .Linus H. SIMPSON, of Pittsburg, in the county of Allegheny and State of Iennsylvania, have invented a new and useful improvement in the Manufacture ofDiaWBais; and I do hereby declare the following to be a full, clear, and exact descrip tion thereof.

My invention rciatesV to an improvement in 1o the manufacture of draw-bars of the kind shown in Figure 6 of the accompanying drawings; and it consists in forming a body-blank, securing the head-blank on this body-blank mechanically as a preliminary step, and then f5 reheating and welding them together.

It also consists in certain preferred methods for practicing this invention.

The object of my invention is to obviate the defects existing in prior methods of manufacture o f draw-bars, which were the diiiculty in properly uniting the head and body of the bar, getting them in proper relation to each other, and making a secure union.

It has also for its object to reduce the labor and time consumed in the manufacture, and, generally, to produce a cheaper, stronger, and otherwise better bar than heretofore.

The invention is illustrated in the accompanying drawings, in which Fig. l is a plan 3o view of the die-block preferably used in my improved manufacture. Fig. 2 is a vertical crosssection of the complete bed-die, the section being on the line .fc :v of Fig. l. Fig. Sis also a vertical section of the complete bed-die,

the section being on the line y y of Fig. 2 and at right angles to the 4sectional plane of that tgure. Fig. 4 is a perspective sectional vieur of the plunger or moving die. Fig. 5 is a perspective plan view of the matrix or bed-die.

are Fig. 6 is a perspective view of the completed draw-bar. Fig. 7 is a perspective view of the blanks constituting the straps and head or ring ofthe draw-bar before'they are Welded, to more clearly illustrate the mode of manufacture.

Fig. 8 is a vertical longitudinal section of the parts shown in Fig. 7. Fig. 9 isaperspective View showing the ringblankfor the draw-bar head in an incomplete state. Fig. l() is a plan view of a part of the ringblank adapted to be 5o set on the draw-bar straps.

Like symbols of reference indicate like parts in each.

In carrying out my invention I first form a blank, A, Figs. 7 and 8, in the form ofa substantially rectangular' fork having two side bars or straps, a, a, and an end piece, o?, connecting these straps. This blank forms the or body shank of the draw-bur. The free ends of the straps a a have on their outer sides recesses or shoulders b, above the bases of which the ends of the straps extend to form stems b, preferably of curved or irregular form. rlhe blank is thickened up ata near its ends to strengthen it. The head of the draw-bar is constituted by a ring-blank, c, of the usual oval outline, whose inner periphery is provided with lateral notches or recesses c', Fig. 10, which are substantial counterparts of the stems b', which form the shank of the recesses t). The ring c is made by lap-Welding and shaping a metal bar as shown in Fig. 9, and then punching out or otherwise forming the recesses c. The ring thus made is set on the shoulders b of the straps c c, the ends of which then project above the ring, as shown in Figs. 7 and S. I then prefer to upset the end of one or both of the straps, as shown at the upper end of one of the stems b', Fig. S, to con-l fine the ring in position during the succeeding steps. The remaining steps in the manufacture consist in the upsetting and welding of the ends of the straps down onto the ring, Welding the ring to the straps in the recesses c', and finally shaping the ring to form the draw-bar head. This I do by the dies shown on the first sheet of the drawings.

As shown in Figs. 2, 3, and 5, the surface of the bed-die is shaped to correspond with the form of the under side of the finished drawbar head, and in the center is a vertical hole, e, in which the shank of the draw-bar iits. A casing or box, f, is shrunk around the upper parts of the die-block d.

ci are lugs or stops at the side of the diebloclr, arranged to limit the motion of the moving die., The die-block d sits Within a recess on the surface of a bed-block, g, and is there held by a removable key, g. The block gis provided with a horizontal hole passing through the block and intersecting the verti- 10o cal hole e. When the draw-bar is set in posi-1 tion in the die, a keybar, h, is put throughv this horizontal hole and through the space between the straps of the draw-bar. The function of this key is to confine the draw-bar and die-box and to prevent them from moving upward with the plunger or moving die. The

moving die or plungerj is fixed to the end of a vertically-reciprocatin g steam-hammer stock 0r drop. It has a central tongue, 7c, which is adapted to enter through the ring c into the space between the straps a a and lateral flanges m, whose under surfaces are, as shown in Fig. 4, shaped so las to be counterparts of the surface of the head of the finished drawbar.

After the blanks A and e have been put together, as shown in Fig. 7, they are reheated and put, when at awelding heat, into the beddie, the shank A fitting into the hole e and the ring c resting upon the surface of the beddie. The key h is then inserted into the hole in the block g through the space between the straps of the draw-bar. The tongue 7a of the moving die enters through the ring c into the space between the straps, and the flanges m of the moving die upset the projecting ends or stems b of the straps a a', making them iat with the ring, and the compression of the ring and straps between the bed-die and plunger welds the ring and straps together, and causes them to assume the finished shape shown in Fig. 6. The key h holds the draw-bar and enables the moving die to be retracted without Sticking to the blank.

To remove the draw-bar from the die d after the withdrawal of the moving die, the key g is removed and the casingjiwith its contained die, is taken out of the bed-block g. For this purpose a side of the recess of the block g in which the die is set and a side of the hole e is left open, as shown in Fig. 1, so that the whole of the casingf may be drawn out laterally. When drawn out, the casing f, which carries the draw-bar, is partially supported by a chain -hooked to a handle, f. The casing is then inverted, and a few strokes of a hammer on the end of the draw-bar will dislodge it. This feature of the apparatus is important, because otherwise the draw-bar would be difficult to remove. By the use of these dies the parts of the draw-bar are very firmly united at one operation. VVhen my method of manufacture is employed the cost is small and the finished draw-bar is very durable and serviceable.

The preliminary uniting of the body-blank and vhead before the operation of welding is 1. An improvement in the art of making I draw-bars, which consists in forming a bodyblank and head-blank, securing them together as a preliminary step, and then reheating and welding them, substantially as and for the purposes described.

2. An improvement in the manufacture oi' draw-bars, which consists in forming a bodyblank, A, having projecting stems at its ends, and a head-blank, c, seating the head-blank on the end of the body-blank A,and finally uniting the head to the ends of the body-blank and to the stems by welding, substantially as and for the purposes described.

3. An improvement in the manufacture of draw-bars, which consists in forming a bodyblank, A, having laterally shouldered or recessed ends, and a head-blank, c, adapted to sit on the shoulders or recesses below the level of the ends ofthe body-blank, and iinally uniting the blanks together by Welding them and upsetting the projecting ends ofthe bodyblank upon the head-blank, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 25th day of May, A. D. 1887.

JAMES H. SIMPSON.

Vitnesses:

XV. B. ConWiN, THoMAs W. BAKEWELL. 

